74VHC573N Equivalent & Substitute Parts

Part Overview

The 74VHC573N is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The 20-PDIP package and core electrical specifications remain consistent across available alternatives, enabling direct functional replacement in existing applications.

Substiute Parts

74VHC573N

onsemiIn Stock: 101274VHC573N Datasheet

Current PartRFQ

SN74AHC573N

Texas InstrumentsIn Stock: 1858SN74AHC573N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VHC573N is determined by strict alignment of the following critical parameters:

• Logic type and circuit configuration (D-Type Transparent Latch, 8:8)
• Output type (Tri-State)
• Supply voltage range (2V ~ 5.5V minimum compatibility)
• Package and pinout (20-DIP, 0.300" pitch)
• Mounting type (Through Hole)
• Operating temperature range (-40°C ~ 85°C)
• Output current capability (8mA minimum for both high and low states)

The SN74AHC573N from Texas Instruments meets all these criteria, providing functional equivalence for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The SN74AHC573N is the direct functional equivalent for the obsolete 74VHC573N. Both components share identical logic architecture, pinout, package specifications, and electrical operating parameters. The SN74AHC573N offers the advantage of active product status with current manufacturing support from Texas Instruments, ensuring long-term availability and supply chain stability.

The SN74AHC573N demonstrates improved propagation delay performance (1ns versus 4.5ns), which represents a performance enhancement without introducing compatibility concerns. Both devices maintain identical output current specifications and voltage supply ranges, confirming pin-for-pin compatibility.

Compliance certifications are equivalent across both parts, with REACH Unaffected and EAR99 classifications. The SN74AHC573N carries ROHS3 compliance, supporting modern environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74AHC573N directly replace the 74VHC573N without circuit modifications?

A: Yes. Both components share identical pinout, package configuration (20-DIP), logic type (D-Type Transparent Latch 8:8), tri-state output capability, and electrical operating parameters (2V ~ 5.5V supply, -40°C ~ 85°C operating range, 8mA output current). Direct socket substitution is supported.

Q: What is the significance of the propagation delay difference between these parts?

A: The SN74AHC573N exhibits faster propagation delay (1ns) compared to the 74VHC573N (4.5ns). This represents improved performance and does not create compatibility issues in existing circuit designs. Timing-critical applications benefit from this enhancement.

Q: Are there packaging or supplier considerations for the SN74AHC573N?

A: The SN74AHC573N is supplied in tube packaging by Texas Instruments, whereas the 74VHC573N packaging format is not specified. Both use identical 20-DIP (0.300", 7.62mm) package specifications suitable for through-hole mounting. Verify packaging requirements for your specific procurement and assembly processes.

Q: What is the product status difference, and why does it matter?

A: The 74VHC573N is classified as obsolete, indicating discontinued manufacturing and limited availability. The SN74AHC573N maintains active product status with ongoing manufacturing support from Texas Instruments, ensuring reliable supply chain access and technical support continuity.

Q: Are there compliance or regulatory differences between these parts?

A: Both components carry REACH Unaffected and EAR99 classifications. The SN74AHC573N additionally carries ROHS3 compliance certification, supporting modern environmental and regulatory standards. No compliance barriers exist for substitution.